Chinese Communist Party leader Xi Jinping heads to Argentina Thursday, where he will be received as an honored guest at the G-20 – even as human rights activists urged Argentina to arrest another delegate: Saudi Crown Prince Mohammed bin Salman.

A column in the Chinese state-run newspaper the Global Times quotes political experts warning that “religious extremism” — defined as any religious observance from Islam to Christianity to the Falun Gong group — has become a dire threat to Chinese Communism, and regulation of the internet is key to stopping it.

Human rights researchers have published an updated study accusing China of conducting tens of thousands of organ transplants using the bodies of political prisoners without their consent. While the practice has been known to occur in the communist nation for decades, Beijing alleges that it long stopped harvesting organs from prisoners of conscience.

Anastasia Lin, who was crowned Miss World Canada in May, has been banned from competing for the global beauty pageant title in China. While she was not given a reason for being banned from entering China, she believes her outspoken criticism of the Communist Party has made her a target.

This week, a prominent Japanese university opened an exhibit detailing medical experiments performed upon live American prisoners of war in WW2. Such horrors are not confined to the previous century, according to a documentary by filmmaker Leon Lee, who chronicled the harvesting of organs from tens of thousands of live prisoners in China.